[deliverable/linux.git] / sound / pci / hda / hda_beep.c

/*
 * Digital Beep Input Interface for HD-audio codec
 *
 * Author: Matthew Ranostay <mranostay@embeddedalley.com>
 * Copyright (c) 2008 Embedded Alley Solutions Inc
 *
 *  This driver is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This driver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/input.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/export.h>
#include <sound/core.h>
#include "hda_beep.h"
#include "hda_local.h"

enum {
	DIGBEEP_HZ_STEP = 46875,	/* 46.875 Hz */
	DIGBEEP_HZ_MIN = 93750,		/* 93.750 Hz */
	DIGBEEP_HZ_MAX = 12000000,	/* 12 KHz */
};

static void snd_hda_generate_beep(struct work_struct *work)
{
	struct hda_beep *beep =
		container_of(work, struct hda_beep, beep_work);
	struct hda_codec *codec = beep->codec;
	int tone;

	if (!beep->enabled)
		return;

	tone = beep->tone;
	if (tone && !beep->playing) {
		snd_hda_power_up(codec);
		beep->playing = 1;
	}
	/* generate tone */
	snd_hda_codec_write(codec, beep->nid, 0,
			    AC_VERB_SET_BEEP_CONTROL, tone);
	if (!tone && beep->playing) {
		beep->playing = 0;
		snd_hda_power_down(codec);
	}
}

/* (non-standard) Linear beep tone calculation for IDT/STAC codecs 
 *
 * The tone frequency of beep generator on IDT/STAC codecs is
 * defined from the 8bit tone parameter, in Hz,
 *    freq = 48000 * (257 - tone) / 1024
 * that is from 12kHz to 93.75Hz in steps of 46.875 Hz
 */
static int beep_linear_tone(struct hda_beep *beep, int hz)
{
	if (hz <= 0)
		return 0;
	hz *= 1000; /* fixed point */
	hz = hz - DIGBEEP_HZ_MIN
		+ DIGBEEP_HZ_STEP / 2; /* round to nearest step */
	if (hz < 0)
		hz = 0; /* turn off PC beep*/
	else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
		hz = 1; /* max frequency */
	else {
		hz /= DIGBEEP_HZ_STEP;
		hz = 255 - hz;
	}
	return hz;
}

/* HD-audio standard beep tone parameter calculation
 *
 * The tone frequency in Hz is calculated as
 *   freq = 48000 / (tone * 4)
 * from 47Hz to 12kHz
 */
static int beep_standard_tone(struct hda_beep *beep, int hz)
{
	if (hz <= 0)
		return 0; /* disabled */
	hz = 12000 / hz;
	if (hz > 0xff)
		return 0xff;
	if (hz <= 0)
		return 1;
	return hz;
}

static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
				unsigned int code, int hz)
{
	struct hda_beep *beep = input_get_drvdata(dev);

	switch (code) {
	case SND_BELL:
		if (hz)
			hz = 1000;
		/* fallthru */
	case SND_TONE:
		if (beep->linear_tone)
			beep->tone = beep_linear_tone(beep, hz);
		else
			beep->tone = beep_standard_tone(beep, hz);
		break;
	default:
		return -1;
	}

	/* schedule beep event */
	schedule_work(&beep->beep_work);
	return 0;
}

static void turn_off_beep(struct hda_beep *beep)
{
	cancel_work_sync(&beep->beep_work);
	if (beep->playing) {
		/* turn off beep */
		snd_hda_codec_write(beep->codec, beep->nid, 0,
				    AC_VERB_SET_BEEP_CONTROL, 0);
		beep->playing = 0;
		snd_hda_power_down(beep->codec);
	}
}

static void snd_hda_do_detach(struct hda_beep *beep)
{
	input_unregister_device(beep->dev);
	beep->dev = NULL;
	turn_off_beep(beep);
}

static int snd_hda_do_attach(struct hda_beep *beep)
{
	struct input_dev *input_dev;
	struct hda_codec *codec = beep->codec;
	int err;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	/* setup digital beep device */
	input_dev->name = "HDA Digital PCBeep";
	input_dev->phys = beep->phys;
	input_dev->id.bustype = BUS_PCI;

	input_dev->id.vendor = codec->vendor_id >> 16;
	input_dev->id.product = codec->vendor_id & 0xffff;
	input_dev->id.version = 0x01;

	input_dev->evbit[0] = BIT_MASK(EV_SND);
	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
	input_dev->event = snd_hda_beep_event;
	input_dev->dev.parent = &codec->bus->pci->dev;
	input_set_drvdata(input_dev, beep);

	err = input_register_device(input_dev);
	if (err < 0) {
		input_free_device(input_dev);
		printk(KERN_INFO "hda_beep: unable to register input device\n");
		return err;
	}
	beep->dev = input_dev;
	return 0;
}

int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
{
	struct hda_beep *beep = codec->beep;
	if (!beep)
		return 0;
	enable = !!enable;
	if (beep->enabled != enable) {
		beep->enabled = enable;
		if (!enable)
			turn_off_beep(beep);
		return 1;
	}
	return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device);

int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
{
	struct hda_beep *beep;
	int err;

	if (!snd_hda_get_bool_hint(codec, "beep"))
		return 0; /* disabled explicitly by hints */
	if (codec->beep_mode == HDA_BEEP_MODE_OFF)
		return 0; /* disabled by module option */

	beep = kzalloc(sizeof(*beep), GFP_KERNEL);
	if (beep == NULL)
		return -ENOMEM;
	snprintf(beep->phys, sizeof(beep->phys),
		"card%d/codec#%d/beep0", codec->bus->card->number, codec->addr);
	/* enable linear scale */
	snd_hda_codec_write_cache(codec, nid, 0,
		AC_VERB_SET_DIGI_CONVERT_2, 0x01);

	beep->nid = nid;
	beep->codec = codec;
	codec->beep = beep;

	INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
	mutex_init(&beep->mutex);

	err = snd_hda_do_attach(beep);
	if (err < 0) {
		kfree(beep);
		codec->beep = NULL;
		return err;
	}

	return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);

void snd_hda_detach_beep_device(struct hda_codec *codec)
{
	struct hda_beep *beep = codec->beep;
	if (beep) {
		if (beep->dev)
			snd_hda_do_detach(beep);
		codec->beep = NULL;
		kfree(beep);
	}
}
EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);

static bool ctl_has_mute(struct snd_kcontrol *kcontrol)
{
	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	return query_amp_caps(codec, get_amp_nid(kcontrol),
			      get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE;
}

/* get/put callbacks for beep mute mixer switches */
int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	struct hda_beep *beep = codec->beep;
	if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {
		ucontrol->value.integer.value[0] =
			ucontrol->value.integer.value[1] = beep->enabled;
		return 0;
	}
	return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
}
EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_get_beep);

int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	struct hda_beep *beep = codec->beep;
	if (beep) {
		u8 chs = get_amp_channels(kcontrol);
		int enable = 0;
		long *valp = ucontrol->value.integer.value;
		if (chs & 1) {
			enable |= *valp;
			valp++;
		}
		if (chs & 2)
			enable |= *valp;
		snd_hda_enable_beep_device(codec, enable);
	}
	if (!ctl_has_mute(kcontrol))
		return 0;
	return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
}
EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_put_beep);
Commit	Line	Data
1cd2224c MR	1	/*
	2	* Digital Beep Input Interface for HD-audio codec
	3	*
	4	* Author: Matthew Ranostay <mranostay@embeddedalley.com>
	5	* Copyright (c) 2008 Embedded Alley Solutions Inc
	6	*
	7	* This driver is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This driver is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include <linux/input.h>
	23	#include <linux/pci.h>
5a0e3ad6	24	#include <linux/slab.h>
1cd2224c	25	#include <linux/workqueue.h>
d81a6d71	26	#include <linux/export.h>
1cd2224c MR	27	#include <sound/core.h>
1cd2224c MR	28	#include "hda_beep.h"
b7b51141	29	#include "hda_local.h"
1cd2224c MR	30
	31	enum {
	32	DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */
	33	DIGBEEP_HZ_MIN = 93750, /* 93.750 Hz */
	34	DIGBEEP_HZ_MAX = 12000000, /* 12 KHz */
	35	};
	36
	37	static void snd_hda_generate_beep(struct work_struct *work)
	38	{
	39	struct hda_beep *beep =
	40	container_of(work, struct hda_beep, beep_work);
	41	struct hda_codec *codec = beep->codec;
e914b25e	42	int tone;
1cd2224c	43
4d4e9bb3 TI	44	if (!beep->enabled)
	45	return;
	46
e914b25e TI	47	tone = beep->tone;
	48	if (tone && !beep->playing) {
	49	snd_hda_power_up(codec);
	50	beep->playing = 1;
	51	}
1cd2224c	52	/* generate tone */
411fe85c	53	snd_hda_codec_write(codec, beep->nid, 0,
e914b25e TI	54	AC_VERB_SET_BEEP_CONTROL, tone);
	55	if (!tone && beep->playing) {
	56	beep->playing = 0;
	57	snd_hda_power_down(codec);
	58	}
1cd2224c MR	59	}
1cd2224c MR	60
fa797966 TI	61	/* (non-standard) Linear beep tone calculation for IDT/STAC codecs
	62	*
	63	* The tone frequency of beep generator on IDT/STAC codecs is
	64	* defined from the 8bit tone parameter, in Hz,
	65	* freq = 48000 * (257 - tone) / 1024
369693dc	66	* that is from 12kHz to 93.75Hz in steps of 46.875 Hz
fa797966 TI	67	*/
	68	static int beep_linear_tone(struct hda_beep *beep, int hz)
	69	{
369693dc PV	70	if (hz <= 0)
369693dc PV	71	return 0;
fa797966	72	hz = 1000; / fixed point */
369693dc PV	73	hz = hz - DIGBEEP_HZ_MIN
369693dc PV	74	+ DIGBEEP_HZ_STEP / 2; /* round to nearest step */
fa797966 TI	75	if (hz < 0)
	76	hz = 0; /* turn off PC beep*/
	77	else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
369693dc	78	hz = 1; /* max frequency */
fa797966 TI	79	else {
fa797966 TI	80	hz /= DIGBEEP_HZ_STEP;
369693dc	81	hz = 255 - hz;
fa797966 TI	82	}
	83	return hz;
	84	}
	85
	86	/* HD-audio standard beep tone parameter calculation
	87	*
	88	* The tone frequency in Hz is calculated as
	89	* freq = 48000 / (tone * 4)
	90	* from 47Hz to 12kHz
	91	*/
	92	static int beep_standard_tone(struct hda_beep *beep, int hz)
	93	{
	94	if (hz <= 0)
	95	return 0; /* disabled */
	96	hz = 12000 / hz;
	97	if (hz > 0xff)
	98	return 0xff;
	99	if (hz <= 0)
	100	return 1;
	101	return hz;
	102	}
	103
1cd2224c MR	104	static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
	105	unsigned int code, int hz)
	106	{
	107	struct hda_beep *beep = input_get_drvdata(dev);
	108
	109	switch (code) {
	110	case SND_BELL:
	111	if (hz)
	112	hz = 1000;
57d8ff61	113	/* fallthru */
1cd2224c	114	case SND_TONE:
fa797966 TI	115	if (beep->linear_tone)
	116	beep->tone = beep_linear_tone(beep, hz);
	117	else
	118	beep->tone = beep_standard_tone(beep, hz);
1cd2224c MR	119	break;
	120	default:
	121	return -1;
	122	}
1cd2224c MR	123
	124	/* schedule beep event */
	125	schedule_work(&beep->beep_work);
	126	return 0;
	127	}
	128
e914b25e TI	129	static void turn_off_beep(struct hda_beep *beep)
	130	{
	131	cancel_work_sync(&beep->beep_work);
	132	if (beep->playing) {
	133	/* turn off beep */
	134	snd_hda_codec_write(beep->codec, beep->nid, 0,
	135	AC_VERB_SET_BEEP_CONTROL, 0);
	136	beep->playing = 0;
	137	snd_hda_power_down(beep->codec);
	138	}
	139	}
	140
123c07ae JK	141	static void snd_hda_do_detach(struct hda_beep *beep)
	142	{
	143	input_unregister_device(beep->dev);
	144	beep->dev = NULL;
e914b25e	145	turn_off_beep(beep);
123c07ae JK	146	}
	147
	148	static int snd_hda_do_attach(struct hda_beep *beep)
1cd2224c MR	149	{
1cd2224c MR	150	struct input_dev *input_dev;
123c07ae	151	struct hda_codec *codec = beep->codec;
1cd2224c MR	152	int err;
1cd2224c MR	153
1cd2224c	154	input_dev = input_allocate_device();
b7baa9a0	155	if (!input_dev)
6a12afb5	156	return -ENOMEM;
1cd2224c MR	157
	158	/* setup digital beep device */
	159	input_dev->name = "HDA Digital PCBeep";
	160	input_dev->phys = beep->phys;
	161	input_dev->id.bustype = BUS_PCI;
	162
	163	input_dev->id.vendor = codec->vendor_id >> 16;
	164	input_dev->id.product = codec->vendor_id & 0xffff;
	165	input_dev->id.version = 0x01;
	166
	167	input_dev->evbit[0] = BIT_MASK(EV_SND);
	168	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
	169	input_dev->event = snd_hda_beep_event;
	170	input_dev->dev.parent = &codec->bus->pci->dev;
	171	input_set_drvdata(input_dev, beep);
	172
	173	err = input_register_device(input_dev);
	174	if (err < 0) {
f6154d6d	175	input_free_device(input_dev);
123c07ae	176	printk(KERN_INFO "hda_beep: unable to register input device\n");
1cd2224c MR	177	return err;
1cd2224c MR	178	}
123c07ae JK	179	beep->dev = input_dev;
	180	return 0;
	181	}
	182
123c07ae JK	183	int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
	184	{
	185	struct hda_beep *beep = codec->beep;
3fd877d3	186	if (!beep)
13dab080	187	return 0;
3fd877d3	188	enable = !!enable;
13dab080 JK	189	if (beep->enabled != enable) {
13dab080 JK	190	beep->enabled = enable;
e914b25e TI	191	if (!enable)
e914b25e TI	192	turn_off_beep(beep);
123c07ae JK	193	return 1;
	194	}
	195	return 0;
	196	}
	197	EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device);
	198
	199	int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
	200	{
	201	struct hda_beep *beep;
257dfb41	202	int err;
123c07ae JK	203
123c07ae JK	204	if (!snd_hda_get_bool_hint(codec, "beep"))
9bb1fe39 TI	205	return 0; /* disabled explicitly by hints */
	206	if (codec->beep_mode == HDA_BEEP_MODE_OFF)
	207	return 0; /* disabled by module option */
1cd2224c	208
123c07ae JK	209	beep = kzalloc(sizeof(*beep), GFP_KERNEL);
	210	if (beep == NULL)
	211	return -ENOMEM;
	212	snprintf(beep->phys, sizeof(beep->phys),
	213	"card%d/codec#%d/beep0", codec->bus->card->number, codec->addr);
1cd2224c	214	/* enable linear scale */
8bc0a846	215	snd_hda_codec_write_cache(codec, nid, 0,
1cd2224c MR	216	AC_VERB_SET_DIGI_CONVERT_2, 0x01);
	217
	218	beep->nid = nid;
1cd2224c MR	219	beep->codec = codec;
	220	codec->beep = beep;
	221
	222	INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
123c07ae JK	223	mutex_init(&beep->mutex);
123c07ae JK	224
257dfb41 TI	225	err = snd_hda_do_attach(beep);
	226	if (err < 0) {
	227	kfree(beep);
	228	codec->beep = NULL;
	229	return err;
2dca0bba JK	230	}
2dca0bba JK	231
1cd2224c MR	232	return 0;
1cd2224c MR	233	}
ff7a3267	234	EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);
1cd2224c MR	235
	236	void snd_hda_detach_beep_device(struct hda_codec *codec)
	237	{
	238	struct hda_beep *beep = codec->beep;
	239	if (beep) {
54f7190b	240	if (beep->dev)
123c07ae	241	snd_hda_do_detach(beep);
c44765b8	242	codec->beep = NULL;
123c07ae	243	kfree(beep);
1cd2224c MR	244	}
1cd2224c MR	245	}
ff7a3267	246	EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);
0401e854	247
265d931a DH	248	static bool ctl_has_mute(struct snd_kcontrol *kcontrol)
	249	{
	250	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	251	return query_amp_caps(codec, get_amp_nid(kcontrol),
	252	get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE;
	253	}
	254
0401e854 TI	255	/* get/put callbacks for beep mute mixer switches */
	256	int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol,
	257	struct snd_ctl_elem_value *ucontrol)
	258	{
	259	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	260	struct hda_beep *beep = codec->beep;
265d931a	261	if (beep && (!beep->enabled \|\| !ctl_has_mute(kcontrol))) {
0401e854	262	ucontrol->value.integer.value[0] =
265d931a	263	ucontrol->value.integer.value[1] = beep->enabled;
0401e854 TI	264	return 0;
	265	}
	266	return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
	267	}
	268	EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_get_beep);
	269
	270	int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol,
	271	struct snd_ctl_elem_value *ucontrol)
	272	{
	273	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
	274	struct hda_beep *beep = codec->beep;
14bc9c6d DH	275	if (beep) {
	276	u8 chs = get_amp_channels(kcontrol);
	277	int enable = 0;
	278	long *valp = ucontrol->value.integer.value;
	279	if (chs & 1) {
	280	enable \|= *valp;
	281	valp++;
	282	}
	283	if (chs & 2)
	284	enable \|= *valp;
	285	snd_hda_enable_beep_device(codec, enable);
	286	}
265d931a DH	287	if (!ctl_has_mute(kcontrol))
265d931a DH	288	return 0;
0401e854 TI	289	return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
	290	}
	291	EXPORT_SYMBOL_HDA(snd_hda_mixer_amp_switch_put_beep);